/* Khối widget trong bài viết — 26/09/2026.
   Dùng chung cho trang bài công khai (templates/reference/{vi,en}/post.html) và khung soạn
   trực quan ở teacher/posts.php, để bài soạn trông đúng như khi đăng.
   HTML do post_render_content() (app/services/blog.php) sinh ra. */
.pb-video, .pb-btn-row, .pb-copy, .pb-callout, .pb-table-wrap, .pb-related, .pb-faq, .pb-readmore, .pb-divider {
  --pb-navy: #01468c;
  --pb-navy-soft: #eaf2fc;
  --pb-gold: #f5b60a;
  --pb-gold-soft: #fff8e3;
  --pb-gold-ink: #8a5e00;
  --pb-line: #e4e7ef;
  --pb-ink: #101828;
  --pb-muted: #667085;
}

/* Video 16:9 */
.pb-video { margin: 1.6rem 0; }
.pb-video-frame { position: relative; aspect-ratio: 16 / 9; border-radius: 14px; overflow: hidden; background: #0b1220; }
.pb-video-frame iframe, .pb-video-frame video { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; display: block; }
.pb-video figcaption { margin-top: .5rem; font-size: .9rem; color: var(--pb-muted); text-align: center; }

/* Nút bấm */
.pb-btn-row { display: flex; flex-wrap: wrap; gap: .6rem; margin: 1.4rem 0; }
.pb-btn {
  display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: .7rem 1.4rem;
  border-radius: 999px; background: var(--pb-gold); color: #1f1400 !important; font-weight: 700; line-height: 1.25;
  text-decoration: none !important; box-shadow: 0 6px 18px rgba(245, 182, 10, .28); transition: transform .15s, box-shadow .15s;
}
.pb-btn:hover { transform: translateY(-1px); box-shadow: 0 10px 24px rgba(245, 182, 10, .36); }

/* Khối copy */
.pb-copy { margin: 1.4rem 0; border: 1px solid var(--pb-line); border-radius: 14px; overflow: hidden; background: #f8fafc; }
.pb-copy-head {
  display: flex; align-items: center; justify-content: space-between; gap: .75rem;
  padding: .55rem .6rem .55rem 1rem; border-bottom: 1px solid var(--pb-line); background: #fff;
  font-size: .85rem; font-weight: 700; color: var(--pb-navy);
}
.pb-copy-btn {
  flex: 0 0 auto; min-height: 34px; padding: .35rem .9rem; border: 1px solid #cdd3e1; border-radius: 999px;
  background: #fff; color: var(--pb-ink); font: inherit; font-weight: 600; cursor: pointer;
}
.pb-copy-btn:hover { border-color: var(--pb-navy); color: var(--pb-navy); }
.pb-copy-btn.is-done { background: #ecfdf3; border-color: #abefc6; color: #067647; }
.pb-copy pre { margin: 0; padding: 1rem; overflow-x: auto; white-space: pre-wrap; word-break: break-word; background: transparent; border: 0; }
.pb-copy code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .9rem; line-height: 1.6; color: var(--pb-ink); background: none; padding: 0; }

/* Ghi chú */
.pb-callout {
  margin: 1.4rem 0; padding: 1rem 1.15rem 1rem 1.1rem; border: 1px solid; border-left-width: 4px; border-radius: 12px;
  background: var(--pb-navy-soft); border-color: #b2ddff; border-left-color: var(--pb-navy);
}
.pb-callout--tip { background: var(--pb-gold-soft); border-color: #f3d583; border-left-color: var(--pb-gold); }
.pb-callout--warn { background: #fef3f2; border-color: #fecdca; border-left-color: #d92d20; }
.pb-callout-title { margin: 0 0 .35rem !important; font-weight: 800; color: var(--pb-navy); }
.pb-callout--tip .pb-callout-title { color: var(--pb-gold-ink); }
.pb-callout--warn .pb-callout-title { color: #b42318; }
.pb-callout-body > p { margin: 0 0 .5rem; }
.pb-callout-body > p:last-child { margin-bottom: 0; }

/* Bảng */
.pb-table-wrap { margin: 1.4rem 0; overflow-x: auto; border: 1px solid var(--pb-line); border-radius: 12px; -webkit-overflow-scrolling: touch; }
.pb-table { width: 100%; border-collapse: collapse; margin: 0; font-size: .95rem; }
.pb-table th, .pb-table td { padding: .7rem .9rem; border-bottom: 1px solid var(--pb-line); text-align: left; vertical-align: top; }
.pb-table th { background: var(--pb-navy); color: #fff; font-weight: 700; }
.pb-table tbody tr:nth-child(even) td { background: #f8fafc; }
.pb-table tr:last-child td { border-bottom: 0; }

/* Bài viết liên quan */
.pb-related { margin: 1.6rem 0; padding: 1rem 1.15rem; border: 1px solid var(--pb-line); border-radius: 14px; background: #fff; }
.pb-related-title { margin: 0 0 .5rem !important; font-weight: 800; color: var(--pb-navy); text-transform: uppercase; letter-spacing: .03em; font-size: .85rem; }
.pb-related ul { list-style: none; margin: 0; padding: 0; }
.pb-related li { margin: 0; padding: 0; border-top: 1px dashed var(--pb-line); }
.pb-related li:first-child { border-top: 0; }
.pb-related li::before, .pb-related li::marker { content: none; }
.pb-related a { display: flex; gap: .5rem; padding: .55rem 0; color: var(--pb-ink); font-weight: 600; text-decoration: none; }
.pb-related a::before { content: "→"; color: var(--pb-gold); font-weight: 800; }
.pb-related a:hover { color: var(--pb-navy); }

/* FAQ */
.pb-faq { margin: 1.8rem 0; }
.pb-faq-item { margin: 0 0 .6rem; border: 1px solid var(--pb-line); border-radius: 12px; background: #fff; overflow: hidden; }
.pb-faq-item summary {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: .85rem 1rem;
  font-weight: 700; color: var(--pb-ink); cursor: pointer; list-style: none;
}
.pb-faq-item summary::-webkit-details-marker { display: none; }
.pb-faq-item summary::after { content: "+"; flex: 0 0 auto; font-size: 1.3rem; line-height: 1; color: var(--pb-navy); }
.pb-faq-item[open] summary::after { content: "−"; }
.pb-faq-item[open] summary { color: var(--pb-navy); }
.pb-faq-a { padding: 0 1rem .9rem; color: var(--pb-ink); }
.pb-faq-a > p { margin: 0 0 .5rem; }
.pb-faq-a > p:last-child { margin-bottom: 0; }

/* Xem thêm */
.pb-readmore { margin: 1.2rem 0; padding: .75rem 1rem; border-left: 4px solid var(--pb-gold); border-radius: 0 10px 10px 0; background: var(--pb-gold-soft); }
.pb-readmore-label { font-weight: 800; color: var(--pb-gold-ink); }
.pb-readmore a { font-weight: 700; color: var(--pb-navy); }

/* Đường kẻ */
.pb-divider { margin: 2rem auto; width: 100%; height: 0; border: 0; border-top: 1px solid var(--pb-line); opacity: 1; }

/* Theme trang công khai ép đoạn <p> trong bài về weight 500 — tiêu đề hộp phải đậm */
.pb-callout p.pb-callout-title, .pb-related p.pb-related-title { font-weight: 800; }
.pb-readmore .pb-readmore-label, .pb-copy .pb-copy-head span { font-weight: 800; }